say it: RUHM-buh-ling
rumbling is a noun and adjective meaning "a loud low dull continuous noise". It is pronounced /ˈɹʌmbəlɪŋ/ — RUHM-buh-ling. It carries 2 recorded senses.
continuous full and low-pitched throbbing sound
“the rumbling rolling sound of thunder”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for rumbling come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.